.progress {
  width: 100%;
  position: relative;
  display: block;
  height: 1px;
  background-color: #e1e1e1;

  .progress-bar {
    position: absolute;
    display: inline-block;
    top: 0;
    left: 0;
    height: 1px;
    transition: .5s;

    &.loading {
      background-color: #ceecd2;
    }

    &.playing {
      background-color: #6bbd7a;
    }
  }

}